Before the victory of the Anti-Japanese War, Yu Zecheng, a military commander, was dissatisfied with the corruption of the Kuomintang and was developed into an underground worker of our party, lurking in the Tianjin Station of the military commander, codenamed "Emei Peak". Due to work requirements, he and Cuiping, a female guerrilla captain, became a fake couple. Cuiping was not used to being an official wife and was full of dangers. Yu Zecheng's lover Zuo Lan also went to Tianjin to perform a mission. He was suspected by the agents. Yu Zecheng, Zuo Lan and others teamed up to eliminate and drive away Ma Kui and Lu Qiaoshan from Tianjin Station, completing the latent mission. Zuo Lan's sacrifice made Cuiping understand the importance of underground struggle, and her cooperation with Yu Zecheng became more tacit. They obtained Tianjin's city defense plan, but a fatal mistake caused Cuiping to flee. On the eve of liberation, Yu Zecheng tried every means to get the list of potential Kuomintang agents but was unable to send it out. On the way to the airport, he found Cuiping and handed the list to her. The two separated from each other, and Yu Zecheng continued to perform hidden missions...
